Create and publish a Docker image #42

	# source: https://docs.github.com/en/enterprise-cloud@latest/actions/publishing-packages/publishing-docker-images
	name: Create and publish a Docker image

	on:
	schedule:
	- cron: "0 0 * * *"
	release:
	types: [published]
	workflow_dispatch:

	env:
	REGISTRY: ghcr.io
	IMAGE_NAME: ${{ github.repository }}

	jobs:
	build-and-push-image:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Get new commits for nightly build
	run: echo "NEW_COMMIT_COUNT=$(git log --oneline --since '24 hours ago' \| wc -l)" >> $GITHUB_ENV
	if: "${{ env.GITHUB_EVENT_NAME == 'schedule' }}"

	- name: Set new commits for other builds
	run: echo "NEW_COMMIT_COUNT=1" >> $GITHUB_ENV
	if: "${{ env.GITHUB_EVENT_NAME != 'schedule' }}"

	- name: Log in to the Container registry
	uses: docker/[email protected]
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Extract metadata (tags, labels) for Docker
	id: meta
	uses: docker/[email protected]
	with:
	images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
	flavor: "latest=false"

	- name: Build and push docker image
	uses: docker/[email protected]
	with:
	context: .
	file: Dockerfile
	push: true
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}
	if: ${{ env.NEW_COMMIT_COUNT > 0 }}

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